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Cisco 300-420 Exam Syllabus Topics:

Section	Objectives
Network Automation and Programmability	- Controller-based networking design - API-driven network automation concepts
Network Services Design	- Multicast and QoS design considerations - Routing protocols design (OSPF, EIGRP, BGP)
Security Design in Enterprise Networks	- Segmentation and access control design - VPN and perimeter security architecture
Enterprise Campus Network Design	- Campus LAN architecture - Spine-leaf and hierarchical design models
WAN and Edge Connectivity Design	- Traditional WAN and internet edge design - SD-WAN architecture and design considerations
Enterprise Network Design Principles	- Design methodologies and best practices - Scalability and high availability design

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Cisco Designing Cisco Enterprise Networks Sample Questions (Q150-Q155):

NEW QUESTION # 150
Which design consideration must be made when using IPv6 overlay tunnels?

A. Overlay tunnels that connect isolated IPv6 networks can be considered a final IPv6 network architecture.
B. Overlay tunnels can be configured only between border devices and require only the IPv6 protocol stack.
C. Overlay tunnels should only be considered as a transition technique toward a permanent solution.
D. Overlay tunneling encapsulates IPv4 packets in IPv6 packets for delivery across an IPv6 infrastructure.

Answer: B

NEW QUESTION # 151
What is the purpose of a border node in a Cisco SD-Access fabric?

A. connect devices to a network
B. perform network virtualization
C. perform traffic encapsulation and de-encapsulation
D. expand a network

Answer: A

Explanation:
The border node provides connectivity between the SD-Access fabric and networks outside the fabric. In Cisco SD-Access, edge nodes connect endpoints to the fabric, intermediate nodes transport routed IP traffic through the underlay, control-plane nodes maintain endpoint location mappings, and border nodes connect the fabric to external Layer 3 domains such as the data center, WAN, internet edge, or shared services network. A border node may perform proxy tunnel router functions and can de-encapsulate fabric traffic that is destined outside the overlay, but its design purpose is external connectivity for the fabric site. Network virtualization is primarily delivered through virtual networks, VRF separation, LISP control-plane mappings, and VXLAN encapsulation. Expanding the network is too vague and does not identify a Cisco SD-Access role. Therefore, among the available options, the border node is the component used to connect the fabric to the required external network resources. Reference topics: Cisco SD-Access border node, external connectivity, fabric roles, LISP proxy tunnel router, VN-to-VRF mapping.

NEW QUESTION # 152
Drag and drop the descriptions from the left onto the Cisco SD-WAN component they describe on the right.

Answer:

Explanation:

Explanation
Answer Area
is responsible for traffic forwarding, security, encryption, QoS,and routing protocols distributes routes and policy information via OMP enables centralized provisioning and simplifies network changes enables the communication of devices that sit behind NAT

NEW QUESTION # 153
Which integration capability does gRPC provide?

A. leveraging protocol buffers to provide efficient serialization and deserialization of structured data over the network
B. leveraging the LDAP protocol for authentication and directory services ensuring secure access control in RPC communications
C. leveraging the XMPP protocol for real-time messaging and collaboration between client and server applications
D. leveraging GRAPH-API for network monitoring and management providing comprehensive visibility into RPC-related metrics and performance statistics

Answer: A

NEW QUESTION # 154
A customer requests a VPN solution to connect multiple sites with the company headquarters. All the sites use the same IP subnet. The engineer plans to use VPLS. Which solutions must the engineer include in the design?

A. 802.1Q connectivity on the LAN side of the CE
B. different VLANs on each site
C. route exchange with the service provider
D. address translation to hide overlapping subnets

Answer: A

Explanation:
VPLS is the appropriate design model when multiple remote sites must appear to share the same Layer 2 segment. Because all sites use the same IP subnet, the solution must preserve a common broadcast domain rather than require Layer 3 route exchange between unique subnets. Cisco VPLS provides multipoint Layer 2 VPN service across a provider network, allowing customer edge devices at different sites to communicate as though they were attached to the same Ethernet LAN. Including 802.1Q connectivity on the LAN-facing side of the CE is the practical requirement because the CE must carry the relevant VLAN toward the provider- delivered VPLS service. Route exchange with the provider is not the main mechanism because VPLS is a Layer 2 service. NAT would hide overlapping addressing, but it would defeat the requirement to keep the same subnet operational across the sites. Placing each site in a different VLAN would also break the shared- subnet design. The correct design is therefore VPLS with VLAN tagging on the CE LAN side. Reference topics: VPLS, Layer 2 VPN, 802.1Q trunking, shared subnet extension, Ethernet WAN design.

NEW QUESTION # 155
......

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